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  1. Data Management
  2. DM-1551

Prototype HTM-based spatial binning to visualize large number of catalog sources

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    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: SUIT
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      Description

      Currently we are using a generic 2-d binning algorithm, that is finding minimum and maximum values of the two columns to be visualized and bins the values into 2-d grid with the specified number of grid cells.

      This algorithm distorts data in the pole regions and whenever data are on both sides of ra=0. More smart binning based on a spatial index is necessary when reducing the number of (ra,dec) entries intended for visualization.

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          tatianag Tatiana Goldina created issue -
          tatianag Tatiana Goldina made changes -
          Field Original Value New Value
          Epic Link DM-1157 [ 13973 ]
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          tatianag Tatiana Goldina added a comment -

          Researched HTM Libraries. Probably, should be using SDSS SkyServer's HTM library, used in SDSS (http://www.skyserver.org/htm/). They have a java version.

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          tatianag Tatiana Goldina added a comment - Researched HTM Libraries. Probably, should be using SDSS SkyServer's HTM library, used in SDSS ( http://www.skyserver.org/htm/ ). They have a java version.
          tatianag Tatiana Goldina made changes -
          Status To Do [ 10001 ] In Progress [ 3 ]
          xiuqin Xiuqin Wu [X] (Inactive) made changes -
          Epic Link DM-1157 [ 13973 ] DM-1159 [ 13975 ]
          xiuqin Xiuqin Wu [X] (Inactive) made changes -
          Due Date 27/Feb/15
          xiuqin Xiuqin Wu [X] (Inactive) made changes -
          Story Points 20 16
          xiuqin Xiuqin Wu [X] (Inactive) made changes -
          Description Currently we are using a generic 2-d binning algorithm, that is finding minimum and maximum values of the two columns to be visualized and bins the values into 2-d grid with the specified number of grid cells.

          This algorithm distorts data in the pole regions and whenever data are on both sides of ra=0. More smart binning based on a spatial index is necessary when reducing the number of (ra,dec) entries intended for visualization.
          		 Currently we are using a generic 2-d binning algorithm, that is finding minimum and maximum values of the two columns to be visualized and bins the values into 2-d grid with the specified number of grid cells.

          This algorithm distorts data in the pole regions and whenever data are on both sides of ra=0. More smart binning based on a spatial index is necessary when reducing the number of (ra,dec) entries intended for visualization.
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          xiuqin Xiuqin Wu [X] (Inactive) added a comment -

          The research and design work has been finished. The implementation will be done in S15. A new story DM-2197 has been created
          for implementation.

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          xiuqin Xiuqin Wu [X] (Inactive) added a comment - The research and design work has been finished. The implementation will be done in S15. A new story DM-2197 has been created for implementation.
          xiuqin Xiuqin Wu [X] (Inactive) made changes -
          Resolution Done [ 10000 ]
          Status In Progress [ 3 ] Done [ 10002 ]

            People

            Assignee:
            tatianag Tatiana Goldina
            Reporter:
            tatianag Tatiana Goldina
            Watchers:
            Tatiana Goldina, Xiuqin Wu [X] (Inactive)
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            2 Start watching this issue

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